Is Stevia in Protein Powder Bad? What to Know

Stevia shows up in a lot of protein powders because it adds sweetness without adding sugar. With so much conflicting information out there, you'd be forgiven for wondering whether it makes a protein powder bad.

Like most things with supplements, it depends on the rest of the formula, what you need from the product, and how well your body tolerates it.

Some people have no issue with stevia at all. Others avoid it because they don't like the aftertaste, want a shorter ingredient list, or would rather use a protein powder sweetened another way.

So the better question is less "Is stevia bad?" and more "Does this protein powder make sense for me?" Here's what to look at before choosing one.

Why Is Stevia Used in Protein Powder?

Protein powder on its own can taste earthy, bitter or bland, depending on the protein source. Brands use stevia to make it sweeter without adding much sugar, which keeps added sugar low.

Is Stevia in Protein Powder Bad for You?

Stevia doesn't automatically make a protein powder unhealthy. A better way to judge a product is to look at the whole formula:

• How much protein does it provide?
• What is the protein source?
• What other sweeteners are used?
• How long is the ingredient list?
• Does it contain ingredients you personally avoid?
• Does it fit your dietary needs and preferences?

Is Stevia Safe in Protein Powder?

In the U.S., highly purified stevia extracts (steviol glycosides) are generally recognized as safe, and the FDA hasn't questioned their use as sweeteners. Whole-leaf and crude stevia extracts aren't permitted as sweeteners.³ The stevia in protein powders is the purified kind.

The bigger conversation is about non-sugar sweeteners in general. In 2023, the World Health Organization recommended that people not rely on non-sugar sweeteners as a long-term way to control weight or lower the risk of chronic disease.¹

Short-term randomized trials reviewed by the WHO generally didn't show meaningful changes in things like fasting glucose, insulin or blood fats. Longer observational studies, however, found links between higher intake of non-sugar sweeteners and a higher risk of type 2 diabetes, heart disease and death.¹

That sounds alarming, but the WHO also pointed out that observational studies can't prove the sweeteners caused those outcomes. And not all sweeteners are the same: they have different chemical structures and the body handles them differently. The WHO said there wasn't enough evidence to make recommendations about individual sweeteners, including stevia.¹

So there's no reason to call stevia "bad." The more reasonable takeaway is that swapping sugar for a non-sugar sweetener doesn't automatically make something healthier, either.

Stevia and Erythritol Are Not the Same Thing

Stevia is a non-sugar sweetener, while erythritol is a sugar alcohol. Some sweetener blends use both, which is probably where a lot of the confusion comes from.

A 2023 study found that people with higher blood levels of erythritol had a higher risk of heart attack, stroke or death over three years. In lab experiments, erythritol also made blood platelets more likely to clot.²

But the study didn't prove that erythritol caused heart attacks or strokes, and many participants already had heart disease risk factors. Those findings also shouldn't be used as evidence against stevia. The WHO excludes sugar alcohols like erythritol from its definition of non-sugar sweeteners.¹

If you're trying to avoid either one, check the full ingredient list rather than the front of the package. A product marketed as "sweetened with stevia" can still include other sweeteners.

Why Do Some People Choose Protein Powder Without Stevia?

Taste and aftertaste

Some people enjoy stevia, while others notice an aftertaste they don't want in their shakes or recipes. Taste is personal, but it matters if you use protein powder every day.

Personal preference

Some shoppers simply prefer products without stevia, without believing it's harmful. They may prefer another sweetener, an unsweetened product, or a shorter ingredient list.

Simpler formulas

People looking for a stevia-free protein powder are often looking for fewer added ingredients overall, so it's worth comparing the whole ingredient list.

Individual tolerance

People respond differently to foods and sweeteners. If an ingredient doesn't agree with you, a formula without it makes your routine easier to stick with.

Not wanting to rely on non-sugar sweeteners

Some people would rather not make non-sugar sweeteners a regular part of their diet. The WHO's guidance doesn't say stevia is unsafe. It questions whether non-sugar sweeteners offer real long-term benefits for weight or disease prevention, and recommends focusing on overall diet quality instead.¹

Are Protein Shakes With Stevia Healthy?

A protein shake with stevia can still fit into a healthy diet. One sweetener doesn't tell you whether the whole product is nutritious.

Look at the protein amount and source, added sugar, other sweeteners, allergens, gums or emulsifiers, and how the product fits into the rest of your diet.

Likewise, a product without stevia isn't automatically healthier. "Stevia-free" is a preference, not a health guarantee.

What Should You Look for in a Protein Powder Without Stevia?

If you've decided you prefer a stevia-free protein powder, start with the label.

Protein source

Check whether the protein comes from dairy, like whey or casein, or from plants, like pea or brown rice. Your choice may depend on your diet, allergies or whether you eat plant-based.

Protein per serving

Make sure it provides enough protein for why you're using it. A long list of extras doesn't make up for a protein powder that doesn't meet your basic goal.

Other sweeteners

"Stevia-free" doesn't mean "sweetener-free." Check whether the product uses monk fruit, sucralose, sugar alcohols, added sugar or another sweetener instead. Our guide to protein powder without artificial sweeteners breaks down which sweeteners count as artificial.

The entire ingredient list

If simplicity matters to you, look past the front label. Compare how many ingredients each product uses and whether they line up with what you want.

What Does fitppl Use Instead of Stevia?

fitppl's Optimal Plant Protein takes a different approach. Each serving has 26g of organic plant protein from pea and brown rice and 0g of sugar from a four-ingredient formula. It's sweetened with monk fruit and contains no stevia, erythritol, dairy, soy, seed oils, gums or emulsifiers.

It may be a good fit if you want to avoid both stevia and erythritol, or simply prefer to judge a protein powder by its full ingredient list rather than front-label claims. Both of our proteins are stevia-free, and you can compare them on our stevia-free protein powder page.

The Bottom Line

Stevia isn't automatically a reason to reject a protein powder. For some people, it adds sweetness without sugar and works perfectly well. Others prefer protein powder without stevia because of taste, tolerance, dietary preference or a desire for a simpler formula.

The better question isn't simply "Is stevia bad?" but "Does this protein powder, as a whole, fit what I want?" If you prefer plant-based protein with no stevia and a short ingredient list, Optimal Plant Protein may be worth a try.